Fire-box stay-bolt for locomotive and other boilers.



r E. I. DODDS. FIRE BOX STAY BOLT FOR LOGOMOTIVE AND OTHER BOILERS.

APPLICATION FILED OCT. 13, 1911. 1,077,975. Patented Nov. 11, 1913.

2 SHEETS-SHEET 1.

I J/W/ i1 25 22 2o l6 IN 24 INVENTOR %QQM E. I. DODDS. FIRE BOX STAY BOLT FOR LOGOMOTIVE AND OTHER BOILERS.

APPLICATION FILED OCT. 13, 1911.

2 SHEETS-SHEET 2.

44 a5 a? .FikZ 37 86 2 WITNESSES:

COLUMBIA PLANOGRAPH co.. WASHINGTON. D. c.

Patnted Nov. 11, 1913.

UNITED STATES PATENT OFFICE.

ETI-IAN I. DODDS, OF CENTRAL VALLEY, NEW YORK, ASSIGNOR T0 KERNER TMANN- FACTURING COMPANY, OF PITTSBURGH, IPENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

Specification of Letters Patent.

Patented Nov. 11, 1913.

Application filed October 13, 1911. Serial No. 654,510.

To all whom it may concern Be it known that I, ETHAN I. DoDDs, a citizen of the United States, residing at Central Valley, in the county of Orange and State of New York, haveinven-ted new and useful Improvements in Fire-Box Stay-Bolts for Locomotive and other Boilers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a longitudinal section through a portion of one form of bolt made in accordance with my invention; Fig. 2 is a plan View of the same; Fig. 3 is a View similar to Fig. 1 of a modified form of bolt; Fig. 4 is a plan view of the bolt shown in Fig. 3; Fig. 5 is a view similar to Fig. 1, showing another modified form of bolt; Fig. 6 is a plan view of the bolt shown in Fig. 5; and Figs. 7, 8, 9'and 10 are views similar to Fig. 1, showing other modified forms of bolts.

' My invention relates to improvements in stay bolts that extend from the fire box sheet to the outside boiler sheet through the water and steam space of the boiler, and are secured to both of said sheets by means of screw threaded connections.

The object of my invention is to provid a bolt having a semi-universal oint so that the fire box sheet may yield and equalize itself when it expands and contracts.

Another object of my invention is to provide a bolt of this character which is cheap of construction, which can readily be assembled, and which can be placed in position from the inside of the fire box, without dismantling or stripping off the lagging, etc.

Another object of my invention is to provide a bolt of this character in which the various changes may be made in the details of construction and general arrangement of the parts, without departing from the spirit and scope ofmy invention as defined in the appended claims.

In Figs. 1 and 2 of the drawing, the numerals l and 2 designate the boiler sheets or plates; 3 designates the body of the stay bolt which is provided with hemispherical heads 5; extending radially from the body of the bolt 8 are fins 4; 7 and 8 are caps, which are secured to the ends of the bolt 3 by means of the metal 6, which is poured into the caps through the ends thereof, to fill the space between the heads 5 and said caps. The cap 7 is provided with a screw threaded portion 9, while the cap 8 is screw threaded on its periphery, as indicated at 11, and is provided with a wrench seat 13. The inner diameter of the threads 11 on the cap 8 is greater than the outer diameter of the cap 7, so that the cap 7 is first passed through the opening in the sheet 2, and its screw threaded portion 9 is engaged with the screw threads in the plate 1, while the screw threads 11 on the cap 8 engage the screw threads in the opening in the plate 2. The member 8 is rotated until the cap 7 ams up against the face of the plate 1.

The three members are rotated with each other by means of. the fins 4, which extend into slots 10 and 12 in the caps 7 and 8 respectively.

14 designates tell-tale holes which are drilled through the cast metal 6 and into the body of the bolt 3, and are adapted to permit steam or water to escape, if any'portion of the caps or the bolt is broken.

The-device shown in Fig. l is assembled in the following mannerz The caps 7 and 8 and the bolt 8 may be made in any well known manner. A suitable core is then placed around each end of the bolt between the heads and the fins 4, and the ends of the bolt are then inserted into the caps 7 and 8. Metal of a suitable alloy is then poured through the openings through the ends of the caps, which fills the entire space within said caps around the heads 5 and the balls seated inthe sockets in the cast metal portions 27, and are provided with fins 22 which engage slots 18 in the ends of the tube 15. These connecting members are also pro vided with tell-tale holes 26 and are also screw threaded in a manner. similar to' the members 'I and 8, shown in Figs. 1 and 2. This bolt is built up. or assembled in the following mannerz A piece of metal such tube and a core is placed about the neck of each ofthe connecting members 20. These members are then inserted into the ends of the tube 15, and metal is then poured into the space surrounding the heads through openings 17 through the tube, after which the core about the necks of the connecting members is removed f In Figs. 5 and 6, I have shown stillanother modified form of bolt, in which 28 designates a tubular. bolt, one end of which is provided with a hemi-spherical recess 29 for the reception of the connecting member 32. The other end of this tube is provided with a shoulder 30and the space between the end of'the connecting member at this end of the tube and the shoulder 30 is filled with cast metal 27 in a manner similar to the filling of the space in the construction shown in Figs. 8 and 4. The inner ends of the connecting members 32 are slotted for the reception of key plate 3.8, which forms the sults from the provis on of a bolt in which the several parts are connected toeach otherdriving connection between the, two members 32. i

In the construction shown in Fig. 7, 34 designates the bolt which is provided with fins 4, similar to the fins shown in Fig. 1, the

for retaining the heads 37 in position. end of this bolt is provided with a bushing 43, which is internally threaded for the reception ofa threaded plugtfi having screw threads for engaging a threaded opening in the sheet 1. Each ofzthese bushings is. pr

the fins 4. In this construction the heads are cast about the ends of the bolt within the bushings, the outer ends thereof being milled at the points indicated at 38. The plug 45 is then placed in position and the.

bolt is ready for use.

members having spherical sockets, which engage the heads 49 of the bolt d8. The socket members are placed in their proper position within a mold and cast metal is poured through openings 53 in the socket members, and the bolt 48 is cast in position, together with the fins 4 extending therefrom, which use connecting members similar to those shown in Fig. 8, merely casting the heads 3.7 i on the ends of the tube in a manner similar i to the casting of the entire bolt and heads in. Fig. 8..

as indicated at 19 is first slipped into the In Fig. 10, I have. shown a construction somewhat similar to that shown in Fig. 9, in which the bolt is. formedv from a tube (it having a plurality of openings 17, through the head of the body of the bolt, and also passing out through openings. in the. lower face of the, tube. to form projections 4t. In this construction the metal passing out through vents is also drilled out after completion of the bolt in order. to permit the heads of the bolt to move freely within the sockets.

The advantages of my invent-ion result from the provision of a stay bolt having three members connected to each other so that they will readily vibrate with relation to each other and at the. same'time form a connection for rotating the one with relation to. the other.

Another advantage of my invention re by means ofcast metal which ispoured dur- .ing the assembling thereof to. connect the several parts to, each other.

ends thereof being provided with grooves 85 5 One 1 screw threaded connected, member at each end, and a. cast metal p r i n between e connecting member and the body portion forconnecting the body portion to'the connect-v ing members; substantially, as described. vided with grooves 4L1 for the reception of;

I claim: 0 1. A stay-bolt having a body portion, a

2. A stay-bolt having a connecting mem- :ber secured to each end, said connecting 2 members having spherical sockets, and cast metal headswithin said sockets and on the ends of the stay-bolts for connecting the bolt 1 to the socket members; substantially as described. In Fig. 8, I have shown two connecting i 3. A stay-bolt having screwethreadeding members having slots in their adjacent the ends of the bolt within the sockets for seends and radially extending fins on the bolt curing the bolt to the connecting members; 10 iegistngricrllg with said slots; substantially as substantially as described,

esori e 4. A stay-bolt having connecting members ETHAN at each end, said connecting members having Witnesses: sockets, flanges on the ends of the bolt With- S. J. GENSIER, in the sockets, and cast metal surrounding M. FRIEDMAN.

Copies of this patent may be obtained for five cents each, by addressing the f Commissioner of Patents,

' Washington, D. G. r 

